Mr Jensen would not comment on the cause of death but said forensic investigations were still being carried out and police were looking for the rest of her body.

As well as the metal attached to the torso, Mr Jensen said the remains were mutilated in what appeared to be an attempt to ensure that decomposition gases passed out of the body, to make it less likely to float.

This reads exactly like a crime drama but it occurred in real life. Is there a potential motive that we know about? Who on earth invites a random journalist onto a homemade submarine to murder them? And what on earth would make a person choose to spend an undisclosed amount of time cut off from the world in a metal tube with only a single other occupant who is mostly a stranger to them?